Probably because old calendars (such as the Persian Calendar) used 360 days for a year-when they watched the stars they saw them revolve around the North Star one degree per day.
September 27, 2015 will bring a supermoon lunar eclipse at nightfall. The last lunar eclipse of this magnitude occurred in 1982, and the next one of a similar magnitude will be in 2033. A lesser lunar eclipse will come in 2018. The lunar eclipse part of this phenomenon, according CTV, is caused by the Earth inserting itself between the sun and the moon. As this happens, the Earth casts its shadow on the face of the moon.
Solar and lunar eclipses come in pairs â a lunar eclipse always takes place two weeks before or after a solar eclipse. The September 27/ 28, 2015 Total Lunar Eclipse will be preceded by a Partial Solar Eclipse on September 13, 2015.